- Category: Water Feature
- Type: Island
- Latitude/Longitude: 58°1'44"N 7°4'0"W
- Eastings/Northings: 101009, 915646
- OS Grid: NB010156
- Mapcode Local: GBR 87YH.MXD
- Mapcode Global: WGW1B.FG2B
Location and coordinates are for the approximate centre of Grèine Sgeir within this administrative area.
Geographic features and populated places may cross administrative borders.